Then you covered the basics so you are in par with primary school kid level but you kinda lacking in level of a high school kid. Then my best recommendation would be this game:
Hana to Taiyou to Ame to (Japan) PS2 ISO Game ID: SLPS-25034. Languages: Japanese. For Sony PlayStation 2.
retrogametalk.com
Long story short it's a walking simulator puzzle game require you to listen to tons of people who talk about tons of topic you hear in daily life. Dialogues are fully subtitled when sometimes voices are absent + you even have to read a fictional guide book in the game to pass the game + every chapter you constantly seeing same words so it is probably intentional so if a high school kid had playing this game and saw a word they never saw or they didn't know its meaning they would learn it and then constant usage of same word will teach them these words for good for sure.
It's not a game a person barely covered the basics can make sense but I think it will be a step up for you.
If this game's Japanese is too easy for you then we gotta up the game!!!:
Pyuu to Fuku! Jaguar Byuu to Deru! Megane-Kun (Japan) GBA Languages: Japanese. For the GameBoy Advance.
retrogametalk.com
This game is what an high school kid who often reads different materials can understand. You need to be literate to survive its word plays!!!
If the game's Japanese would be too hard for you then you may step-down the game a little and play a serious visual novel with tons of variety of topics like Ace Attorney:
Become Phoenix Wright and experience the thrill of battle as you fight to save your innocent clients in a court of law. Play all 14 episodes, spanning the first three games, in one gorgeous collection.
store.steampowered.com
If you are lacking in informal, street talk and slangs and shit and how fucked up Japanese can be in fictional world then you gotta play some street racing and related games:
Racing Lagoon (English Patched) PSX ISO Game ID: SLPS-02038. Languages: English Patched, Japanese. For Sony PlayStation.
retrogametalk.com
However the game is also phoetic and philosophical that even an university student who specifically educated in deeper aspect of Japanese can have a hard time understanding what some in-game text even says because it is part of how Japanese writing can be that sometimes what matters is not meanings but how some kanjis look cool or sound. You don't understanding anything but you feel the words!!!
If Racing Lagoon would burn your head there are manageable related games like these but unfortunately they are not on this website because whoever manages repo has no care for Japanese street racing and whatnot scene!!!! lol:
- Shin Bakusou Dekotora Densetsu: A PS2 game about Japanese truckers who love to modify their trucks visually. That's why the game is filled with Japanese "dekotora" trucker culture as visual novel aspects, truck "wars" you play and then my favorite you can listen to various enka songs with Japanese subtitle to learn more about Japanese while you driving and even your trucks or smiles to some enka songs!!! lol
- Chou Saisoku! Zoku-sha King BU no BU: Bucchigiri Densetsu 2-kai: It's a PS2 game and my favorite street racing game after Racing Lagoon. Instead of ordinary Japanese street racers the game is about zokusha culture that is about crazy modification of cars that no amount of words can describe how crazy these cars looks like. The in-game text is very informal Japanese with every day usage in hardcore way and it touches upon classic idioms, metaphors, way of saying stuff and goroawase (Japanese wordplay by using numbers). In the game you will see the number 4649 and when you read it you'll notice it sounds "Yoroshiku" that means "Nice to meet you". It's that kind of Japanese game to practice!!! lol
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